diff options
Diffstat (limited to 'lib/Transforms/Scalar/JumpThreading.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/JumpThreading.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/JumpThreading.cpp b/lib/Transforms/Scalar/JumpThreading.cpp index 0b8906d..b3ec2fc 100644 --- a/lib/Transforms/Scalar/JumpThreading.cpp +++ b/lib/Transforms/Scalar/JumpThreading.cpp @@ -827,7 +827,6 @@ bool JumpThreading::ProcessBlock(BasicBlock *BB) { return false; } - /// SimplifyPartiallyRedundantLoad - If LI is an obviously partially redundant /// load instruction, eliminate it by replacing it with a PHI node. This is an /// important optimization that encourages jump threading, and needs to be run @@ -842,6 +841,12 @@ bool JumpThreading::SimplifyPartiallyRedundantLoad(LoadInst *LI) { if (LoadBB->getSinglePredecessor()) return false; + // If the load is defined in a landing pad, it can't be partially redundant, + // because the edges between the invoke and the landing pad cannot have other + // instructions between them. + if (LoadBB->isLandingPad()) + return false; + Value *LoadedPtr = LI->getOperand(0); // If the loaded operand is defined in the LoadBB, it can't be available. |